Two IRS credit cards were used to buy online pornography, though the employees said the cards were stolen. One of the workers reported five agency credit cards lost or stolen.

IRS employees used agency credit cards to make more than 273,000 purchases totaling nearly $108 million in 2010 and 2011, according to the report by the Treasury inspector general for tax administration.

The vast majority of those purchases were legitimate, the report said. However, the report said the IRS has inadequate controls to prevent inappropriate purchases.